/**
 *    Copyright (C) 2025-present MongoDB, Inc.
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the Server Side Public License, version 1,
 *    as published by MongoDB, Inc.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    Server Side Public License for more details.
 *
 *    You should have received a copy of the Server Side Public License
 *    along with this program. If not, see
 *    <http://www.mongodb.com/licensing/server-side-public-license>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the Server Side Public License in all respects for
 *    all of the code used other than as permitted herein. If you modify file(s)
 *    with this exception, you may extend this exception to your version of the
 *    file(s), but you are not obligated to do so. If you do not wish to do so,
 *    delete this exception statement from your version. If you delete this
 *    exception statement from all source files in the program, then also delete
 *    it in the license file.
 */

#include "mongo/rpc/metadata/audit_client_attrs.h"

namespace mongo::rpc {
namespace {

const auto getAuditClientAttrs =
    Client::declareDecoration<synchronized_value<boost::optional<AuditClientAttrs>>>();

}  // namespace

AuditClientAttrs::AuditClientAttrs(const BSONObj& obj) {
    AuditClientAttrsBase::parseProtected(obj);
}

boost::optional<AuditClientAttrs> AuditClientAttrs::get(Client* client) {
    return getAuditClientAttrs(client).get();
}

void AuditClientAttrs::set(Client* client, AuditClientAttrs clientAttrs) {
    *getAuditClientAttrs(client) = std::move(clientAttrs);
}

void AuditClientAttrs::resetToPeerClient(Client* client) {
    auto session = client->session();
    if (!session) {
        reset(client);
        return;
    }

    auto local = session->local();
    auto remote = session->getSourceRemoteEndpoint();
    std::vector<HostAndPort> proxies;
    if (auto proxyEndpoint = session->getProxiedDstEndpoint()) {
        proxies.push_back(*proxyEndpoint);
    }

    *getAuditClientAttrs(client) = rpc::AuditClientAttrs(
        std::move(local), std::move(remote), std::move(proxies), false /* isImpersonating */);
}

void AuditClientAttrs::reset(Client* client) {
    *getAuditClientAttrs(client) = boost::none;
}

ImpersonatedClientMetadata AuditClientAttrs::generateClientMetadataObj() {
    ImpersonatedClientMetadata clientMetadata;

    std::vector<HostAndPort> hosts;
    hosts.push_back(getRemote());
    hosts.push_back(getLocal());

    if (const auto& intermediates = getProxies(); !intermediates.empty()) {
        for (const auto& address : intermediates) {
            hosts.push_back(address);
        }
    }

    clientMetadata.setHosts(std::move(hosts));

    return clientMetadata;
}

}  // namespace mongo::rpc
